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Ultra-violet laser probe measurement of40Ar/39Ar age profile in phlogopite

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Chinese Science Bulletin

Abstract

Ultra-Violet Laser Ablation Microprobe (UVLAMP) extraction technique enables the direct investigation of Ar-Ar age profile in crystals, and yields more information on rates and durations of geological process than conventional single time snapshots. Phlogopite flakes from lamprophyre at Pishan dyke in western Kunlun were dated by using an UV laser (λ = 213 nm) microprobe with spot analyses. The results show good agreement with those from the conventional40Ar/39Ar step heating experiments. This indicates that the Ar isotopes are distributed homogenously in the phlogopite and the UVLAMP can be a powerful tool in the study of thermal history.

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Authors and Affiliations

  1. Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029, Beijing, China

    Huaiyu He, Fei Wang, Haiqing Sang, Yinglan Wang & Rixiang Zhu

  2. Laboratory of Geochronology, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium

    Ariel Boven

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  1. Huaiyu He
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  2. Fei Wang
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  3. Haiqing Sang
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  4. Yinglan Wang
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  5. Ariel Boven
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He, H., Wang, F., Sang, H. et al. Ultra-violet laser probe measurement of40Ar/39Ar age profile in phlogopite. Chin. Sci. Bull. 49, 1949–1952 (2004). https://doi.org/10.1007/BF03184287

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  • DOI: https://doi.org/10.1007/BF03184287

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